Diamond-drill and burnishing-lathe.



J. H. ODONNELL.

DIAMOND DRILL AND BURNISHING LATHE.

APPLICATION FILED AUG. 6,1903

Witnessesaa tln Attorney PATENTED JAN. 23, 1906.

UNITED STATES PATENT OFFICE.

JOHN H. ODONNELL, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATERBURY WIRE DIE COMPANY, OF 'WATERBURY, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

DIAMOND-DRILL AND BURNlSHlNG-LATHE.

Specification of Letters Patent.

Patented Jan. 23, 1906.

' Application filed August 6. 1903. Serial No. 168,543.

To all whom it may concern:

Be it known that I, JOHN H. ODoNNELL, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain be used either for drilling a hole in a dia mond, rounding the corners thereof, counterboring said hole, or sizing a hole previously bored.

To these and other ends my invention consists in the diamond-drill and burnishinglathe hereinafter described, and more par ticularly pointed out in the claims.

Referring to the drawings, in which like numerals of reference designate like parts in the several figures, Figure 1 is a plan view of my improved machine complete. Fig. 2 is a front elevation thereof. Fig. 3 is a side elevation of the standard for supporting the slide-rod. Fig. 4 is a transverse sectional view taken upon line A B of Fig. 2, and 5 is a similar view taken upon line C I) of Fig. 1.

In carrying out my invention I provide a head 1, which can be secured by screws to a table or bench and within which is rotatably mounted a spindle 2, having a cone 3 thereon. One end of this spindle is mounted within the end of a set-screw 4, threaded through said head 1 and locked in any of its adjusted po sitions by a thumb-nut 5. The other end of said spindle is rotatable within a bearingplug 6, that is held in position by a cap 7.

As illustrated, this machine is designed to operate upon a diamond which has already been drilled and fastened into the die, which is secured in a chuck 8, threaded upon the forward end of the spindle 2. It may, however, be used to drill a hole through the diamond before being placed in the die by simply removing the chuck and fastening a drill or needle thereon and fixing the diamond upon the end of the slide hereinafter described. The spindle 2 is rotated by a belt 9, which connects the cone 3 with the pulley 10 upon the shaft 11, that is mounted within the standards 12 and rotated in any of the many Ways well known to the art.

The numeral 13 designates a bracket which is adjustably secured at one end to a lug 14, integral with the base 1, and supported at its other end by a screw 15, which is threaded into said bracket with its head resting upon the benchor table to which the machine is secured. Accidental displacement of the screw 15 is prevented by means of the thumbscrew 16.

The means for adjustably securing the bracket 13 to the lug 14 comprises a stud 17,

which projects through a slotted hole 19 in the lug 14 and hub 18 upon the end of the bracket 13,with a thumb-nut 20 threaded upon its upper end. By releasing the thumb-nut 20 the bracket 13 can be shifted to any radial position about the center of said stud and locked in any of its several positions by again tightening said thumb-nut. A limited lateral movement is imparted to the bracket 13 by the thumb screw 21, which is threaded through the shank of said stud 17, and is prevented from endwise movement by the cotter-pin 22 through the said stud adjacent to the end thereof. It is apparent that by loosening the nut 20 and rotating the screw 21 the bracket will shift laterally and can then be secured in any of its adjusted positions by again tightening the nut 20.

Vertically adjustable within the bracket 13 are the two yoke-blocks 23, which are secured in their adjusted positions by the thumb-screws 24 and within which are rotatably mounted the rolls 25, upon which rests the slide 26, round in cross-section, with a hole 27 therethrough, and adjustable endwise on said slide is the collar 28, with the thumb-screw 29 therein for holding it rigid.

Threaded Within the bracket 13 is the spring-supporting rod 30, upon which is slidable the block 31, adjustably secured by the screw 32, and within which is held by the screws 33 one end of the spring 34, the other end of which is bifurcated and straddles the slide 26 in a Well-known manner and bears against the rear face of the collar 28.

The drill-needle or burnishing-tool is secured to the slide 26 by being inserted within the hole 27 and there held against movement by Wax or'other suitable means.

The slide 26 is driven forwardly by the spring 34 and rearwardly by the springpressed rod 35, which is actuated by the cam 36 upon the shaft 11 and is pivotally secured midway of its length in the vertical rockspindle 37, whose lower end is pointed and has a bearing in the slide 38 and into the upper end of which the pointed end of the thumb-screw 39 projects and forms a bearing. This thumb-screw is threaded through the lateral arm of the post 40 and is held in any of its adjusted positions by the screw 41 in the slotted end of said lateral arm. Slide 38 is mounted within the standard 46-and is adjustable therein by means of the thumbscrew 42, which is threaded into one end. of said slide and held against movement within the bracket 43, forming part of said standard. A plate 4.4 and the screws 45, threaded through the standard 41, hold the slide rigidly in any of its adjusted positions.

In operation the die holding the diamond. is fixed within the chuck 8, which is rotated at a high speed, and the needle-drill or burnishing-tool within the non-rotatable slide 26. By means of the adjustable connection be- I tween the bracket 13 and head land the slide 26 with said bracket the tool within the slide 26 can be made to engage the diamond at any desired angle, thereby providing means for counterboring a hole in a diamond or burnishing the hole already out or for securing any other desired end within the range of the invention.

There are many minor changes and alterations that can be made Within my invention aside from those herein shown and suggested, and I would therefore have it understood that I do not limit myself to the exact construction herein shown and described, but claim all that falls fairly within the spirit and scope of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the character described, the combination with a head member; of a spindle rotatable therein; a slide movable to ward and away from said spindle; means for shifting the position of said slide laterally;

and a spring for actuating said slide in the direction of said spindle.

2. In a machine of the character described, the combination with the head member; of a spindle rotatable therein; a bracket; means for securing the same to said head, whereby it may be shifted laterally or radially, said means comprising a stud passing through a part upon said head and a part upon said bracket, and a screw passing through said head part and said stud.

8. In a machine of the character described, the combination with the head member; of a spindle rotatable therein; a slide; rolls for forming a bearing for said slide; and means for adjusting the position of said rolls, whereby the relative position of said slide in relation to said spindle may be varied.

4. In a machine of the character described, the combination with a head member having a lug projecting therefrom; a bracket; means for adjustably and pivotally securing said bracket to said lug; a slide movably mounted upon said bracket; and a spring for actuating said slide in the direction of said head member.

5. In a machine of the character described, the combination with the head member; of a spindle rotatable therein; a slide, circular in cross-section, having an adjustable shoulder thereon; adjustable rolls forming a bearing for said slide; and spring mechanism for actuating said slide in one direction.

6. In a machine of the character described, the combination with the head member 1 having the lug 14 thereon; of the spindle 2 rotatable therein; a bracket 13 means for adjustably securing said bracket to said head member; a slide 26; blocks 23 adjustable within said bracket; and rolls 25 rotatably mounted in said blocks and forming a bearing for said slide.

In testimony whereof I afliX my signature in presence of two witnesses.

JOHN H. ODONNELL.

Witnesses:

FREDERICK E. CHAPMAN, ROGER S. WoTKYNs. 

